固件 OTA 升级进度推送
POST
https://api.chintsmart.com/mqtt/ota
MQTT Topic: /sys/{product_id}/{device_id}/app/down/ota/device/forward
当设备进行固件 OTA 升级时，服务端通过 MQTT 推送升级进度通知。
响应
OTA 升级进度推送
application/json
JSON "error_code": 200, "message_id": "string", "device_id": "string", "data": { "sdk_version": "string", "src_version": "string", "dest_version": "string", "step": 0, "upgrade_status": 0 }
{
}